Cheap price DIN 2391 ST35 BK Thick Wall High – Precision Steel Tube, Round Cold Rolled/drawn Pipe

Precision steel pipe


Cold finished (hard)BK(+C)Tubes do not undergo heat treatment following the final cold forming and, thus, have a rather high resistance to deformation
Cold finished (Soft)BKW
The final heat treatment is followed by cold drawing involving limited deformation. Appropriate further processing allows a certain degree of cold forming (e.g. bending, expanding)
Cold finished and stress-relievedBKS(+SR)Heat treatment is applied following the last cold forming process. Subject to appropriate processing conditions, the increase in the residual stresses involved enables both forming and machining to a certain degree.
AnnealedGBK(+A)The last Cold forming process is followed by annealing in a controlled atmosphere.
NormalizedNBK(+N)The last cold forming process is followed by annealing above the upper transformation point in a controlled atmosphere.

DIN 2391 Precision seamless steel tube 


1. Automotive fields
A. Fuel injection lines/nozzles
B. CNG (Compressed Nature Gas) tube– Burst pressure: 1307Bar, Working Pressure: around 350bar
C. Drive transmission: Steering column elements
D. Gear shafts, hand brake, front axles, airbag inflators, stabilizers, seat fasteners, front-wheel drive shafts

2. Hydraulic Fields
A. Hydraulic circuits (HPL), pneumatic lines, and hydraulic suspension system
B. Hydraulic cylinders (HPZ)

Our advantage

We owned special equipment for manufacturing various high precision products

  1. High-precision cold drawing unit
  2. Bright annealing oven
  3. Straighter
  4. 100% UT inspection if buyer requested
  5. 100% ET inspection if buyer requested
DIN 2391 ST35 BK Thick Wall High - Precision Steel Tube , Round Cold Rolled Pipe
Standard:DIN 2391
Size:OD (4-190mm) x WT (0.5-15mm)
Outer Dimensions:4.0mm – 60.0mm
Wall Thickness:0.5mm – 8 mm
Length:as customers requirements
DIN 2391 ST35 Carbon Steel Pipes Chemical Composition :
StandardGradeCSiMnP maxS max
ST35 DIN 2391 Seamless Pipes Mechanical Properties